JAKARTA, JOURNALARTA.COM – The national B50 biodiesel program, set to take effect in April 2026, is expected to increase diesel vehicle maintenance costs. Diesel car owners may need to set aside an additional around Rp1.9 million to Rp2.5 million per year, especially for diesel filters and fuel tank cleaning.
This increase is not without reason. The B50 formulation, which means a blend of 50% pure palm oil (FAME) and 50% diesel fuel, has stronger detergency (cleaning) and hygroscopic (water-absorbing) properties than B35. This causes diesel filters to work harder and raises the risk of water contamination and mold growth in the fuel tank.
B50 Annual Maintenance Cost Breakdown
Assuming a diesel car is driven 20,000 kilometers per year, several maintenance items will require more frequent replacement. This increase directly affects the vehicle owner’s annual expenses. Here is the estimated breakdown:
| Component | B35 Maintenance | B50 Maintenance | Difference/Year |
|---|---|---|---|
| Diesel Filter Replacement | 2x @Rp 250,000 | 4x @Rp 250,000 | + Rp 500,000 |
| Fuel Additive | – | 6 Bottles @Rp 80,000 | + Rp 480,000 |
| Tank Cleaning | 1x @Rp 300,000 | 2x @Rp 300,000 | + Rp 300,000 |
| Injector Service | 1x @Rp 600,000 | 1x @Rp 600,000 | Unchanged |
| TOTAL ADDITIONAL COST | Rp 1,100,000 | Rp 2,580,000 | + Rp 1,480,000 |
READ ALSO: List of Diesel Cars Safe to Use with B50
It should be noted that these figures are based on service prices at official workshops. Vehicle owners may get more competitive pricing, around 30% cheaper, if they choose independent workshops.
B50’s Impact on Fuel Consumption
In addition to maintenance costs, another affected aspect is fuel efficiency. B50 has a slightly lower calorific value, around 3-5% lower than B35. This means that to cover the same distance, a car will need a slightly larger volume of fuel.
As an illustration, the Toyota Fortuner 2.4, which usually records fuel consumption of 1:12 km/liter with B35, is estimated to drop to 1:11.5 km/liter with B50. If the car travels 20,000 km per year at a subsidized diesel price of Rp6,800/liter:
- With B35: 20,000 km / 12 km/liter = 1,666 liters x Rp6,800 = Rp11,328,800
- With B50: 20,000 km / 11.5 km/liter = 1,739 liters x Rp6,800 = Rp11,825,200
This results in a difference of around Rp500,000 per year in fuel costs.
Total Annual Cost Increase
Combined, the increase in maintenance costs and fuel consumption means the total additional expense for diesel car owners using B50 is around Rp1,480,000 (maintenance) + Rp500,000 (fuel) = Rp1,980,000 per year. This figure could be higher if rounded up or if field prices vary, and could reach Rp2.5 million.
How to Save on B50 Maintenance Costs
Even with the increase, there are several strategies diesel car owners can use to reduce costs:
- Buy Original Diesel Filters Online: Original diesel filters on online platforms are often 20% cheaper than at official workshops.
- Use Fuel Additive Regularly: Using an additive every 3,000 km can help keep the fuel system clean and reduce how often the tank needs to be cleaned.
- Refuel in the Morning or in Cool Weather: Refueling in lower temperatures can minimize evaporation and water condensation in the tank.
Is B50 Still Economical?
Although maintenance and consumption costs rise slightly, B50 remains a much cheaper option than switching to non-subsidized diesel such as Dexlite or Pertamina Dex. Simulation shows:
- If driving 20,000 km per year with Pertamina Dex (average price Rp15,100/liter): 1,666 liters x Rp15,100 = Rp25,196,600
- If using B50 (including additional costs): Rp11,825,200 (fuel) + Rp1,480,000 (maintenance) = Rp13,305,200
The comparison shows significant savings of up to around Rp11,891,400 per year by using subsidized B50 instead of Pertamina Dex.
Tips to Keep the Engine Lasting Longer with B50
To maintain performance and engine durability with B50, here are some important tips:
- Do Not Delay Diesel Filter Replacement: A dirty diesel filter is the main cause of injector damage. Replace it on schedule, or even sooner if it appears dirty.
- Warm Up the Engine for 3 Minutes: Before driving, warm up the engine for at least 3 minutes, especially after the car has been parked overnight. This helps lubricate internal components and clear residue.
- Keep the Tank Filled: Try not to let the fuel tank run empty. Keep at least half a tank. A fuller tank reduces the space for humid air to form water condensation.
With proper planning and maintenance, the impact of higher costs due to B50 use can be minimized. Savings from subsidized diesel remain the main attraction for diesel car owners in Indonesia.
READ ALSO: B50 Officially Implemented in 2026
FAQ: B50 Maintenance Costs
Q: When will B50 begin to be implemented?
A: The B50 program is scheduled to take effect nationwide starting in April 2026.
Q: Why is diesel car maintenance more expensive with B50?
A: B50 has stronger cleaning and water-absorbing properties, causing diesel filters to get dirty faster and increasing the risk of mold in the tank, so these components need to be replaced more often.
Q: What is the estimated increase in annual maintenance costs?
A: The estimated increase is around Rp1,480,000 per year, plus about Rp500,000 for slightly higher fuel consumption, bringing the total increase to around Rp1,980,000 per year.
Q: Are there ways to save on B50 maintenance costs?
A: Yes, you can buy original diesel filters online, use fuel additive regularly, and refuel in the morning or during cold weather.
Q: Is B50 still cheaper than non-subsidized diesel?
A: Much cheaper. Even with higher maintenance costs, total spending with B50 can still save tens of millions of rupiah per year compared with switching to non-subsidized diesel.
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